Anyone out there using the same configuration as mine: Using a LTE-A phone, USB tethering to mini PC, ICS to Gigabit LAN and connect to wifi router.
I found out something fishy on the Windows 10 in the mini PC.
Before USB tethering, i can get speedtest on the Redmi Note 3 Pro with 50-60Mbps.
But after USB tethering, i only got 35Mbps shown in the mini PC, same as through the wifi router by connecting to the wifi with another phone.
Therefore i tried with wifi hotspot with 2.4GHz (the phone is putting very near to the mini PC) and end up the same speed as USB tethering method.
However, if i used wifi hotspot with 5GHz, i can manage to get around 40Mbps++, although i still able to get 50Mbps++ from Redmi Note 3 and another phone connect directly to the hotspot.
So in the end, i end up using Wifi Hotspot method with 5GHz, although i still prefer using USB Tethering but something fishy in Windows 10 that throttle down the speed as USB 2.0 can goes up to 480Mbps while Wifi only can go Max 72Mbps.
I already google but none of them solve this issue, only talking about autotuninglevel but still the same after disable it.
If anyone know how to tweak in Windows 10 please kindly let us know.
This will be useful if in the future the LTE speed can go beyond 150Mbps and i want to route the full speed, not with throttle speed.

Mind sharing average speed of i150 using this M7350?

yup, i found the thread regarding RNDIS 5 freezing issue and they recommend RNDIS 6 driver but i unable to update using their file and i tried to google the Windows 10 64 bit driver for RNDIS but still unable to get it done...
i suggest you don't do this way as your mifi will only discharge while you are using...
but huawei got an accessories which is called AF18, it got Ethernet port and charging port as well on the other end, but not sure with the ethernet baud rate cos i still prefer Gigabit LAN over 10/100Mbps...